Is iphone 16 plus waterproof case profitable to sell on Amazon United States?

The niche generates $55K/yr across 23 tracked products. 2 of 4 products launched in the last 360 days are still selling. 90-day search growth is +8.4%. Flapen's verdict: Skip it (44/100).

How competitive is the iphone 16 plus waterproof case niche?

15 brands and 30 sellers compete. The top 5 products take 58% of clicks and top 5 brands hold 76% of demand.

What do buyers complain about in iphone 16 plus waterproof case?

Top complaints mined from reviews: Size-Overall, Water Resistance, Quality-Overall. The return rate is 3.9%.

When does demand for iphone 16 plus waterproof case peak?

Demand peaks in Jul–Aug; the busiest month runs 2.4× the quietest.

What does it cost to enter the iphone 16 plus waterproof case niche?

Listings span $9.00–$71.71; the average listing price is $25.32 (sweet spot $15–$100). The average incumbent carries 16,442 reviews — the moat a new listing must climb.

iphone 16 plus waterproof case

Skip it

A small market ($55K/yr) — this niche doesn't clear our bar today.

Avg price

Incredible$25.32

avg listing price — sweet spot $15–$100

Price range

Great$9.00–$71.71

cheapest to priciest tracked listing — scored on the share inside $15–$100

Quality gap

Great4.3★

avg incumbent rating — lower means beatable quality

Brand share

Okay76%

top-5 brand share — brands hold most of the demand

Competition

Okay58%

top-5 click share — leaders hold, buyers still browse

Returns

Okay3.9%

return rate — above 5% kills the launch gate

Growth

Okay+8.4%

90-day search growth — must beat 0% to launch

Conversion

Okay2.7%

search→purchase rate — share of searches ending in a sale

Review moat

Bad16,442.26

avg incumbent reviews — the moat a new listing must climb

Market size

Bad$55K

$55K/yr · 81K searches

According to Flapen's Amazon United States niche tracking, iphone 16 plus waterproof case is a $55K/yr Amazon United States market (81K searches/yr). The top 5 brands hold 76% of demand. Demand peaks in Jul–Aug. Verdict: Skip it — 44/100.

Data updated Jul 8, 2026 · scored weekly · How we score niches

iphone 16 plus waterproof case market data

Units sold / yr: 2K–3K; avg 0–100/product
Revenue / yr: $51K–$63K; units × avg price
Conversion rate: 2.7%
Avg BSR: #2,394
Page quality: 0%
Prime: 100%
Sponsored: 65%
Out of stock: 5.5%
Avg brand age: 22 months
Avg seller age: 158 days

Competition & brand share

The top 5 products take 58% of clicks — established leaders, but buyers still shop beyond them.

Brands

15 falling

Sellers

Top-5 brand share

76%

Top 20: 100%

Top-5 click share

58%

Top 20: 96%

Open market

20%

Lanhiem32%
AICase16%
Haireca14%
SPORTLINK10%
ANTSHARE4%
WIFORT4%

Demand & seasonality

Weekly Amazon search volume, last 75 weeks — +8.4% search growth over the last 90 days.

Peak months: Jul, Aug · busiest ÷ quietest = 2.4×

Open Trend

Top iphone 16 plus waterproof case search terms

iphone 16 plus waterproof case35K/yr +17.1%2.8% conv.
iphone 16 plus case waterproof14K/yr +12.5%2.3% conv.
waterproof iphone 16 plus case11K/yr +19.3%1.9% conv.
iphone 16 plus lifeproof case12K/yr -13.3%1.2% conv.
iphone 16 plus case lifeproof5K/yr +8.3%1.6% conv.
lifeproof iphone 16 plus case5K/yr -36.4%0.8% conv.

All search terms

Top iphone 16 plus waterproof case products on Amazon

Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.

Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 23 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

Lanhiem Magnetic Case for iPhone 16 Plus IP68 Waterproof Dustproof Phone Case [Compatible with Magsafe] [Built-in Screen Protector] Full Body Heavy Duty Rugged Phone Cover 6.7 inch Black

Lanhiem$21.344.2★2,739 rev

Haireca for iPhone 16 Plus Waterproof Case with Magsafe Built-in [Camera & Screen Protector] [Lanyard] IP68 Water Proof Full Body Dustproof Heavy Duty Frosted Protective Phone Cover 6.7 Teal

Haireca$23.134.0★776 rev

AICase Compatible with iPhone 16 Plus Case Waterproof Clear Water Proof Built-in Screen Protector Shockproof Dustproof Snowproof Full Body Rugged Underwater Phone Case

AICase$17.564.3★1,582 rev

Lanhiem for iPhone 16 Plus Case IP68 Waterproof Dustproof Shockproof Cases with Built-in Screen Protector 360 Full Body Heavy Duty Rugged Phone Cover for iPhone 16 Plus - 6.7 inch (Black/Clear)

Lanhiem$22.564.4★426 rev

AICase Waterproof Case for iPhone 16 Plus(6.7) with MagSafe Snowproof Dustproof and Shockproof IP68 Certified Real 360 Full Body Protection Fully Sealed Underwater Cover for iPhone 16 Plus

AICase$20.024.4★260 rev

Newest

by launch date

ANTSHARE IP68 Waterproof Case for iPhone 16 Plus - Built-in Screen/Lens Protector - Military Drop Shockproof Full Body Protection for Swimming/Outdoor Black/Clear

ANTSHARE$21.16906 rev

3mo ago

ANTSHARE IP68 Waterproof Case for iPhone 16 Plus - Built-in Screen/Lens Protector - Military Drop Shockproof Full Body Protection for Swimming/Outdoor Pink/Clear

ANTSHARE$22.91906 rev

3mo ago

LOVE BEIDI for iPhone 16 Plus Case Waterproof 6.7 | Shockproof Dust Proof Phone Case Cover with Screen Protector and Kickstand - Black

LOVE BEIDI$15.911 rev

9mo ago

Lanhiem Magnetic for iPhone 16 Plus Waterproof Case Built-in Privacy Screen Protector Compatible with MagSafe Anti-Spy Full Body Phone Case for iPhone 16 Plus 6.7 Black

Lanhiem$29.292,739 rev

10mo ago

Mitywah Waterproof Case for iPhone 16 Plus Shockproof Heavy Duty Case with Built-in Screen Protector Underwater Full Body Protective Metal Case 6.7 inch Yellow

Mitywah$30.6818,333 rev

1y ago

What buyers say about iphone 16 plus waterproof case

What buyers praise and complain about, mined from review topics.

What buyers love

Water Resistance20%

“Case is waterproof”

Quality-Overall12%

“Great product, Exactly as described”

Advertised Vs Actual Product10%

“As shown”

Size-Overall8%

“Great size”

Ease Of Use8%

“It was easy to operate my phone”

Value For Money7%

“Good price”

Efficiency6%

“It works”

Durability4%

“These extra durable pouches are easy to use”

Drop/Impact Protection4%

“Its a good protector”

Strength2%

“Solid product”

What buyers complain about

Size-Overall13%

“Too small”

Water Resistance9%

“Water got inside”

Quality-Overall9%

“Poor quality product”

Durability9%

“Only a 1 time use”

Ease Of Use6%

“It is a little tricky to close”

Touch/Button Controls4%

“my touch screen does not work well”

Image/Picture Clarity4%

“The picture quality is horrible”

Functionality-Overall4%

“doesn't work”

Compatibility-Overall3%

“No,could put it on my phone”

Advertised Vs Actual Product2%

“Not as advertised”

Top return reasons

Size-Overall52%

Value For Money10%

Functionality-Overall4%

Advertised Vs Actual Product4%

Compatibility-Overall4%

Water Resistance3%

Touch Screen3%

Quality-Overall3%

Ease Of Use2%

Color1%

Common questions

Is iphone 16 plus waterproof case profitable to sell on Amazon United States?: The niche generates $55K/yr across 23 tracked products. 2 of 4 products launched in the last 360 days are still selling. 90-day search growth is +8.4%. Flapen's verdict: Skip it (44/100).
How competitive is the iphone 16 plus waterproof case niche?: 15 brands and 30 sellers compete. The top 5 products take 58% of clicks and top 5 brands hold 76% of demand.
What do buyers complain about in iphone 16 plus waterproof case?: Top complaints mined from reviews: Size-Overall, Water Resistance, Quality-Overall. The return rate is 3.9%.
When does demand for iphone 16 plus waterproof case peak?: Demand peaks in Jul–Aug; the busiest month runs 2.4× the quietest.
What does it cost to enter the iphone 16 plus waterproof case niche?: Listings span $9.00–$71.71; the average listing price is $25.32 (sweet spot $15–$100). The average incumbent carries 16,442 reviews — the moat a new listing must climb.